.../ Highlighted Article: CT scans of fallow deer specimens show that the nasal cavities are likely to be involved in the production of their groans. Acoustic variation Mammal Call production Formant Call nasalization Mobile larynx Vocal tract shape Vocal tract resonance Vocalization A key...

... formant frequencies (vocal tract resonances). To our knowledge, formants have to date never been documented in any non-avian reptile, and formants do not seem to play a role in the vocalizations of anurans. We tested for formants in crocodilian vocalizations by using playbacks to induce a female Chinese...

... been hypothesized that birds vary beak gape as a mechanism for varying vocal tract resonances. Nevertheless, few studies have attempted to quantify the effects of beak gape on vocal tract resonances. We replaced eastern towhee, Pipilo erythrophthalmus L. , syringes with a small speaker and obtained...

...Mechteld R. Ballintijn; Carel Ten Cate ABSTRACT The mechanism of sound production in the collared dove Streptopelia decaocto was studied to test the validity of the ‘whistle’ model and to analyze the role of vocal tract resonances. In this study, the vocalizations of six male adult doves were...